package com.wemall.pay.bill.util;

public class BillCore {
    public static String appendParam(String returnStr, String paramId, String paramValue){
        if (!returnStr.equals("")){
            if (!paramValue.equals("")){
                returnStr = returnStr + "&" + paramId + "=" + paramValue;
            }
        }else if (!paramValue.equals("")){
            returnStr = paramId + "=" + paramValue;
        }

        return returnStr;
    }
}




